EP1486257A2 - Spiralförmige Düse - Google Patents

Spiralförmige Düse Download PDF

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Publication number
EP1486257A2
EP1486257A2 EP04253445A EP04253445A EP1486257A2 EP 1486257 A2 EP1486257 A2 EP 1486257A2 EP 04253445 A EP04253445 A EP 04253445A EP 04253445 A EP04253445 A EP 04253445A EP 1486257 A2 EP1486257 A2 EP 1486257A2
Authority
EP
European Patent Office
Prior art keywords
central axis
spiral
spiral nozzle
spray guide
liquid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP04253445A
Other languages
English (en)
French (fr)
Other versions
EP1486257A3 (de
Inventor
Manabu Miyamoto
Masayuki Yamamoto
Toshiyuki Naito
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IHI Corp
Kyoritsu Gokin Co Ltd
Original Assignee
IHI Corp
Kyoritsu Gokin Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by IHI Corp, Kyoritsu Gokin Co Ltd filed Critical IHI Corp
Publication of EP1486257A2 publication Critical patent/EP1486257A2/de
Publication of EP1486257A3 publication Critical patent/EP1486257A3/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/26—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets
    • B05B1/262—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets with fixed deflectors

Definitions

  • the present invention relates to a spiral nozzle.
  • the flue gas which is discharged, for example, from the boiler of a thermal power plant using coal as fuel, contains a sulfur component.
  • a sulfur component contained in the flue gas
  • desulfurization equipment is therefore installed in thermal power plants and the like.
  • three processes a wet process, a dry process, and a semi-dry process, are generally used in this desulfurization equipment.
  • desulfurization equipment using the wet process sprays droplets of an alkaline solution containing calcium carbonate into the flue gas, to thereby neutralize the sulfur component of the flue gas with the alkaline component, and at the same time absorb the sulfur component in the droplets of alkaline solution, and thus remove the sulfur component from the flue gas.
  • a hollow cone, full cone, or spiral nozzle is normally used in the desulfurization equipment to spray droplets of the alkaline solution.
  • the spiral nozzle as shown in FIGS. 1 and 2, comprises a spray guide 100 which is formed in a helix converging towards its own central axis L, and a support part 200 which is formed integral with one end of the non-converging side of the spray guide 100, and formed with a conduit port 210 for passing an alkaline solution.
  • FIG. 2 is a view of the spiral nozzle in FIG. 1 as seen from the left horizontal direction.
  • the spray guide 100 is formed in three coil parts 110, 120, and 130 connected in the central axis L direction, in other words, in a three-tiered coil structure.
  • the bottom faces of the coil parts 110, 120, and 130 are formed as liquid impingement faces 111, 121, and 131, which are set so that the angle of each with respect to the central axis L differs.
  • the entirety of each the liquid impingement faces 111, 121, and 131 is set at a fixed angle with respect to the central axis L.
  • the support part 200 is formed integral with one end of the coil part 130, in other words, with one end on the non-converging side of the spray guide 100, and a flange 300 is formed integral with its own end (bottom end in FIG. 1 and FIG. 2).
  • the spiral nozzle configured in this manner is fixed to a supply device (not shown in drawings) which supplies an alkaline solution to the spiral nozzle at a predetermined pressure, by a support plate 400 formed separate from the spiral nozzle and having through holes 410 penetrated by bolts or screws. More specifically, a support plate flange 420 is formed on the support plate 400, and as shown in the drawing, the support plate flange 420 and the flange 300 are joined with adhesive, and the support plate 400 is fixed to the supply device with the bolts 500, thus fixing the spiral nozzle to the supply device. Moreover, the spray guide 100, the support part 200, and the flange 300 are formed of a ceramic material to prevent corrosion by the alkaline solution. Furthermore, plastic is used for the support plate 400, and metal is used for the bolts 500.
  • the alkaline solution discharged from the supply device is supplied to the spray guide 100 via the conduit port 210.
  • the alkaline solution then impinges on the liquid impingement faces 111, 121, and 131, thus forming fine droplets which are sprayed to the outside.
  • FIG. 3 shows schematically the distribution pattern (hereafter referred to as the 'spray pattern') in a plane perpendicular to the central axis L, of the alkaline solution sprayed from the spiral nozzle.
  • the alkaline solution is distributed in three concentric circles. This is due to the spray guide 100 having a three-tiered coil structure as explained above, wherein the three coil parts 110, 120, and 130 having the liquid impingement faces 111, 121, and 131 are connected inclined each at different angles.
  • 'Spray guide' and 'spray pattern' are terms normally used in this technical field, and the term 'spray' as used here refers to an aggregation of droplets having a particle size of, for example, a few millimeters.
  • Patent document 1 Japanese Unexamined Patent Application, First Publication No. Sho 63-111954
  • Patent document 2 Japanese Unexamined Patent Application, First Publication No. Hei 9-57155
  • Patent document 3 Japanese Unexamined Patent Application, First Publication No. Hei 9-57155
  • the coil parts 110, 120, and 130 have the liquid impingement faces 111, 121, and 131, each inclined at different angles, then at a connection site A of the coil part 110 and the coil part 120 and a connection site B of the coil part 120 and the coil part 130, there is naturally formed an inclined face 'a' connecting the liquid impingement faces 111 and 121, and an inclined face 'b' connecting the liquid impingement faces 121 and 131. Formation of these inclined faces 'a' and 'b' results in an increase in the overall length of the spiral nozzle, increasing the amount of material required for formation of the spiral nozzle, and inviting an increase in manufacturing costs.
  • the spiral nozzle is formed of a ceramic material, even a small increase in the amount of material results in a particular increase in manufacturing cost. Moreover, an increase in the overall length of the nozzle results in a reduction in the number able to be inserted in the furnace for firing, an increase in defects due to collapse, and a consequent further increase in manufacturing cost.
  • the spray pattern of this type of spiral nozzle is distributed in three concentric circles. Therefore spray patterns a1 and b1 occur naturally to connect the individual concentric spray patterns in order to ensure that the individual concentric spray patterns are contiguous.
  • the spray patterns a1 and b1 occur due to the inclined faces 'a' and 'b', and the overall spray pattern becomes nonuniform due to the occurrence of the spray patterns a1 and b1.
  • the flow rate of the alkaline solution sprayed from the spiral nozzle is locally increased, and the sulfur component can no longer be uniformly removed from the flue gas.
  • the flange 300 and the support plate 400 are currently joined with adhesive. Therefore in some environments the adhesive deteriorates, with the possibility of a reduction in life of the spiral nozzle. If the life of the spiral nozzle is reduced, the spiral nozzle must be replaced each time, and the number of replacements is thus increased, so that the maintenance cost of the desulfurization equipment is increased.
  • the present invention takes into consideration the aforementioned problems, with an object of addressing the following points: (1) uniform treatment by uniform spraying of the solution; (2) a reduction in the manufacturing cost of the spiral nozzle by reducing the amount of material forming the spiral nozzle, and the length of the spiral nozzle; (3) a reduction in the manufacturing cost of the equipment incorporating the spiral nozzle by reducing the number of installed spiral nozzles; and (4) a reduction in the maintenance cost of the equipment incorporating the spiral nozzle by extending the life of the spiral nozzle.
  • the present invention adopts as a first means a configuration where, in a spiral nozzle which sprays droplets of a liquid from a spray guide formed in a helix converging towards its own central axis, the spray guide has a liquid impingement face inclined at a predetermined angle with respect to the central axis so that a distribution pattern of the liquid in a plane perpendicular to the central axis is in the form of a spiral shape.
  • the distribution pattern of the liquid has a spiral shape winding at approximately equal spaced pitch.
  • a third means there is adopted a configuration where, in either one of the first and second means, a surface on the central axis side of the spray guide is specified by a surface of a rotating body obtained by rotating an arc having a predetermined radius with respect to the central axis.
  • a fifth means there is adopted a configuration where, in a spiral nozzle having a spray guide formed in a helix converging towards its own central axis, and a support part formed integral with an other end of the spray guide and in which is formed a conduit port for passing a liquid, and which sprays droplets of a liquid from the spray guide, a comer being a site of connection of the spray guide and the support part and a site of the start of the spray guide, is formed along an arc having a predetermined radius.
  • a seventh means there is adopted a configuration where either one of the fifth and sixth means has a flange formed integral with the support part and formed with through holes that are penetrated by bolts or screws.
  • FIG. 4 is a front view of the spiral nozzle according to this embodiment
  • FIG. 5 is a side view from the left of the spiral nozzle in FIG. 4.
  • the spiral nozzle according to this embodiment is provided with a spray guide 1 formed in a helix converging towards its own central axis L, a support part 2 formed integral with one end (the base) on the non-converging side of the spray guide 1 and with a conduit port 21 for passing an alkaline solution, and a flange 3 formed integral with one end of the support part 2 (bottom end in FIG. 4 and FIG. 5), all of these components being formed integral. All components of this spiral nozzle (the spray guide 1, the support part 2, and the flange 3) are formed integral. Moreover they are formed of the same fired ceramic material (for example, Si-SiC) in order to ensure durability when used with an alkaline solution.
  • the same fired ceramic material for example, Si-SiC
  • the spray guide 1 comprises a single three-coil winding with its own bottom face (the face towards the base side) being formed as a liquid impingement face 11 and having an angle with respect to the central axis L specified for each part.
  • the angle of the liquid impingement face 11 with respect to the central axis L is the angle formed between a line of intersection of a plane including the central axis L and the liquid impingement face 11, and the tip central axis L side (the converging side 1 (tip side) of the spray guide 1).
  • Each part of the liquid impingement face 11 of the spiral nozzle according to the present invention is inclined at a predetermined angle to ensure that a spray pattern having a spiral shape with approximately equal pitch as shown in FIG. 6 is obtained.
  • a liquid impingement face 11a at a start portion of the spray guide 1 is formed so that its angle A with the central axis L is 90°, and an angle B between a mid-part 11b of the first coil and a mid-part 11c of the first coil is 89°.
  • the liquid impingement face 11 is inclined with respect to the central axis L so that; an angle C at a mid-part 11d of the second coil is 60°, an angle D at a mid-part 11e of the third coil is 45°, an angle E at a mid-part 11f of the third coil is 26°, and an angle F at the end of the third coil (tip of the spray guide 1) is 20°, and thus a spray pattern having a spiral shape winding at approximately equal pitch as shown in FIG. 6 is obtained.
  • the spiral shape winding has an inside end S and an outside end E, and the radius of the spiral shape winding from the center O gradually increases from the inside end S (radius r1) to the outside end E (radius r2).
  • the spray guide 1 By forming the spray guide 1 while specifying the angle with respect to the central axis L of the liquid impingement face 11 to ensure that the spray pattern has a spiral shape, the angle of the liquid impingement face 11 is gradually and continuously changed with respect to the central axis L.
  • the inclined faces 'a' and 'b' of the conventional spiral nozzle as shown in FIGS. 1 and 2 are therefore not formed, and it is consequently possible to form the spiral nozzle of the present invention with a comparatively small amount of material.
  • the face 12 on the central axis L side of the spray guide 1 is specified by the surface of a body of revolution obtained by rotating an arc of radius 500 mm with respect to the central axis L. Consequently the face 12 on the central axis L side of the spray guide 1 forms a curved surface expanded outwards. Therefore the space enclosed within the spray guide 1 increases, enabling supply of a larger volume of alkaline solution to the spray guide 1, and the spraying of a larger volume of alkaline solution from a single spiral nozzle than is conventionally the case.
  • the face 12 on the central axis L side of the spray guide 1 is specified by the surface of a body of revolution obtained by rotating an arc having a radius within a range of greater than the diameter of the conduit port 21, and less than 2,000 mm.
  • a comer C being the site of connection of the spray guide 1 and the support part 2 and the site of the start of the spray guide 1, is formed along an arc of radius 4 mm.
  • This comer C becomes a stress concentration region when the alkaline solution is supplied to the spray guide 1 at a predetermined pressure.
  • the stress can be dispersed, enabling an increase in the durability of the spiral nozzle.
  • the wall of the spray guide 1 is thin.
  • forming the comer C along an arc of a predetermined radius enables sufficient durability to be obtained.
  • the corner C may be formed along an arc of a radius greater than 3mm. If the comer C is formed along an arc of a radius of less than 3mm, the stress loading on the comer C increases, and sufficient durability cannot be expected.
  • through holes 31 are formed in the flange 3 for penetration of bolts (or screws) 5 to fasten together the spiral nozzle and a supply device (not shown in the drawings) which supplies the alkaline solution to the spiral nozzle at a predetermined pressure.
  • the alkaline solution When the alkaline solution is supplied to the spiral nozzle configured in this manner from the supply device at a predetermined pressure, the alkaline solution is formed into liquid droplets by impinging on the liquid impingement face 11 of the spray guide 1, and a spray pattern having a spiral shape winding at approximately equal pitch is obtained.
  • the alkaline solution can be distributed more uniformly, thus enabling an improvement in the desulfurization effect.
  • Liquid was supplied at a pressure of 0.03MPa to a spiral nozzle according to the aforementioned embodiment, having an overall length of 200 mm, a length in the direction of the central axis L of the spray guide 1 of 145 mm, a diameter of the support part of 120 mm, and a diameter of the conduit port 21 of 100 mm, with the face 12 on the central axis side of the spray guide 1 specified by the surface of a body of revolution obtained by rotation of an arc of a radius of 500 mm with respect to the central axis L, a comer C formed along an arc of a radius of 4mm, and formed of Si-SiC having a modulus of elasticity of the overall body of 360 GPa, and a Poisson's ratio of 0.19.
  • the flow rate of the liquid sprayed from the spiral nozzle was 2,800 L/min
  • the stress loading on the corner C was 30MPa.
  • liquid was supplied at a pressure of 0.03 MPa to a spiral nozzle according to the conventional technology, having an overall length of 250 mm, a length in the direction of the central axis L of the spray guide 1 of 180 mm, a diameter of the support part of 120 mm, and a diameter of the conduit port 21 of 100 mm, with the face 12 on the central axis side of the spray guide 1 specified by the surface of a body of revolution obtained by rotation of a straight line with respect to the central axis L, a comer C formed along an arc of a radius of 2 mm, and formed of Si-SiC having a modulus of elasticity of the overall body of 360 GPa, and a Poisson's ratio of 0.19.
  • the flow rate of the liquid sprayed from the spiral nozzle was 2,000L/min
  • the stress loading on the comer C was 38 MPa.
  • the spiral nozzle is described as being installed in desulfurization equipment. However it is not restricted to this application, and may also be installed in dust settling equipment, and in gas cooling equipment. In such cases, the spiral nozzle need not be formed of a ceramic material.
  • FIG. 7 is a drawing showing a spray pattern according to another embodiment of the present invention.
  • the spray pattern shown in FIG. 6 the radius of the spiral shape winding from the center O gradually increases from the inside end S to the outside end E.
  • the spray pattern shown in FIG. 7 has an inner spiral winding S-M and an outermost arc M-E.
  • the radius of the inner spiral winding S-M from the center O gradually increases from the inside end S to the point M (radius r).
  • the outermost arc M-E has a substantially constant radius r.
  • the central angle 0 of the outermost arc M-E is not limited, but it is preferably between 180° and 360°. More preferably, the center angle ⁇ is between 225° and 315°.
  • the outer periphery of the spray area has a shape near a complete circle, it is easy to arrange a plurality of the spray nozzles so as to obtain a uniform spray density.
  • the spiral nozzle sprays liquid in droplets from the spray guide formed in a helix converging towards its own central axis L, and the spray guide has a liquid impingement face inclined at a predetermined angle so that the liquid distribution pattern in a plane perpendicular to the central axis L forms a spiral shape, and thus the liquid is sprayed uniformly, enabling uniform treatment.

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  • Nozzles (AREA)
EP04253445A 2003-06-12 2004-06-10 Spiralförmige Düse Withdrawn EP1486257A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003168247A JP2005000837A (ja) 2003-06-12 2003-06-12 スパイラルノズル
JP2003168247 2003-06-12

Publications (2)

Publication Number Publication Date
EP1486257A2 true EP1486257A2 (de) 2004-12-15
EP1486257A3 EP1486257A3 (de) 2008-11-19

Family

ID=33296884

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04253445A Withdrawn EP1486257A3 (de) 2003-06-12 2004-06-10 Spiralförmige Düse

Country Status (6)

Country Link
US (1) US20050001066A1 (de)
EP (1) EP1486257A3 (de)
JP (1) JP2005000837A (de)
CN (1) CN1572373A (de)
SG (1) SG127731A1 (de)
TW (1) TW200507941A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3614077A1 (de) * 2018-08-22 2020-02-26 Innosnow AB Düse für eine schneeherstellungsvorrichtung, schneelanzenkopf und verfahren zur erzeugung einer geschlitzten hohlkegelsprühung
USD943708S1 (en) * 2020-06-09 2022-02-15 Water Evaporation Systems, Llc Wastewater atomization nozzle

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EP1896188B1 (de) * 2005-06-29 2010-08-18 Boehringer Ingelheim International GmbH Verfahren und vorrichtung zum zerstäuben einer flüssigkeit
CN101614487B (zh) * 2009-07-21 2012-05-30 北京龙源冷却技术有限公司 一种空冷凝汽器尖峰冷却装置
KR101566495B1 (ko) * 2009-12-23 2015-11-06 재단법인 포항산업과학연구원 워터젯 커팅장치
US20110303767A1 (en) 2010-06-11 2011-12-15 Scott Edward Smith Dispenser having convergent flow path
US9174229B2 (en) 2010-06-11 2015-11-03 The Procter & Gamble Company Dispenser having non-frustro-conical funnel wall
KR101058419B1 (ko) 2010-10-14 2011-08-24 (주) 일진앤드 워터스크린 노즐
CN102261559A (zh) * 2011-06-23 2011-11-30 中国寰球工程公司 一种低温液态烃储罐的冷却系统和冷却方法
CN106140742B (zh) * 2016-08-29 2019-07-30 潍柴动力股份有限公司 一种用于管道的涡流吹扫器
TWI653084B (zh) 2017-11-28 2019-03-11 行政院原子能委員會核能硏究所 具螺旋式噴嘴之降膜式蒸發器
KR102047298B1 (ko) 2017-12-15 2019-11-21 엔트라 주식회사 스파이럴 노즐
CN108642750A (zh) * 2018-04-27 2018-10-12 江苏东方生态清淤工程有限公司 一种用于板框机滤布清洗的仿生螺旋高压喷嘴及其设计方法
US10502512B1 (en) * 2018-08-23 2019-12-10 Smith & Wesson Inc. Firearm muzzle accessory
US11858091B2 (en) 2018-11-30 2024-01-02 Mega Fluid Systems, Inc. Apparatus and method for recirculating fluids
DE102019200212A1 (de) * 2019-01-10 2020-07-16 Lechler Gmbh Verfahren zum Herstellen einer Negativform für eine Spiraldüse, Spiralgrundformpositiv und Spiraldüse
JP7214277B1 (ja) * 2022-04-27 2023-01-30 株式会社サイエンス バブル液発生ノズル

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GB191316295A (en) * 1912-08-19 1914-04-23 Paul Lechler Improvements in Spraying Nozzles.
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GB191316295A (en) * 1912-08-19 1914-04-23 Paul Lechler Improvements in Spraying Nozzles.
GB191223560A (en) * 1912-10-15 1913-02-06 Rudolph Melville Hunter Improvements in and relating to Mist Producing Nozzles.
US5616290A (en) * 1994-04-11 1997-04-01 Mitsubishi Jukogyo Kabushiki Kaisha Gas-liquid contacting apparatus
DE19750068C1 (de) * 1997-11-12 1999-06-24 Lechler Gmbh & Co Kg Axial-Hohlkegeldüse zum Versprühen flüssiger Medien
US6354519B1 (en) * 1999-11-16 2002-03-12 Asahi Kogaku Kogyo Kabushiki Kaisha Spray device for an endoscope

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3614077A1 (de) * 2018-08-22 2020-02-26 Innosnow AB Düse für eine schneeherstellungsvorrichtung, schneelanzenkopf und verfahren zur erzeugung einer geschlitzten hohlkegelsprühung
USD943708S1 (en) * 2020-06-09 2022-02-15 Water Evaporation Systems, Llc Wastewater atomization nozzle

Also Published As

Publication number Publication date
TW200507941A (en) 2005-03-01
EP1486257A3 (de) 2008-11-19
CN1572373A (zh) 2005-02-02
US20050001066A1 (en) 2005-01-06
JP2005000837A (ja) 2005-01-06
SG127731A1 (en) 2006-12-29

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